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kern: implement Svc(Un)MapInsecureMemory

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Michael Scire 2022-10-11 23:44:22 -07:00 • committed by SciresM
parent 5a918f3bc9
commit e7a1e0fee2
8 changed files with 213 additions and 2 deletions
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76
libraries/libmesosphere/source/svc/kern_svc_insecure_memory.cpp Normal file
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/*
* Copyright (c) Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <mesosphere.hpp>
namespace ams::kern::svc {
/* ============================= Common ============================= */
namespace {
Result MapInsecureMemory(uintptr_t address, size_t size) {
/* Validate the address/size. */
R_UNLESS(util::IsAligned(size, PageSize), svc::ResultInvalidSize());
R_UNLESS(size > 0, svc::ResultInvalidSize());
R_UNLESS(util::IsAligned(address, PageSize), svc::ResultInvalidAddress());
R_UNLESS((address < address + size), svc::ResultInvalidCurrentMemory());
/* Verify that the mapping is in range. */
auto &pt = GetCurrentProcess().GetPageTable();
R_UNLESS(GetCurrentProcess().GetPageTable().CanContain(address, size, KMemoryState_Insecure), svc::ResultInvalidMemoryRegion());
/* Map the insecure memory. */
R_RETURN(pt.MapInsecureMemory(address, size));
}
Result UnmapInsecureMemory(uintptr_t address, size_t size) {
/* Validate the address/size. */
R_UNLESS(util::IsAligned(size, PageSize), svc::ResultInvalidSize());
R_UNLESS(size > 0, svc::ResultInvalidSize());
R_UNLESS(util::IsAligned(address, PageSize), svc::ResultInvalidAddress());
R_UNLESS((address < address + size), svc::ResultInvalidCurrentMemory());
/* Verify that the mapping is in range. */
auto &pt = GetCurrentProcess().GetPageTable();
R_UNLESS(GetCurrentProcess().GetPageTable().CanContain(address, size, KMemoryState_Insecure), svc::ResultInvalidMemoryRegion());
/* Map the insecure memory. */
R_RETURN(pt.UnmapInsecureMemory(address, size));
}
}
/* ============================= 64 ABI ============================= */
Result MapInsecureMemory64(ams::svc::Address address, ams::svc::Size size) {
R_RETURN(MapInsecureMemory(address, size));
}
Result UnmapInsecureMemory64(ams::svc::Address address, ams::svc::Size size) {
R_RETURN(UnmapInsecureMemory(address, size));
}
/* ============================= 64From32 ABI ============================= */
Result MapInsecureMemory64From32(ams::svc::Address address, ams::svc::Size size) {
R_RETURN(MapInsecureMemory(address, size));
}
Result UnmapInsecureMemory64From32(ams::svc::Address address, ams::svc::Size size) {
R_RETURN(UnmapInsecureMemory(address, size));
}
}